I'm not talking about their dating history. I'm talking about their backgrounds and personalities (or at least my prefered personalities). Clark's main thing is that he's an alien living a normal life as a reporter, and was raised by a simple and warm couple. He really values the relationship between his parents as an adopted kid. Plus the fact that he's one of the last kryptonians and thus would probably want to take that step in reviving his people by having children of his own.